Specifies the filename containing the target density in *.cube format.In the MGRID section it must be imposed NGRID 1, as it works with onlyone grid. The number of points in each direction, and the spacing mustbe previously defined choosing the plane waves cut-off in section MGRIDkeyword CUTOFF, and the cube dimention in section SUBSYS / CELL / keyword ABC
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Lagrange multiplier defined in the constraint ZMP method. When starting, usesmall values when starting from scratch (around 5,10). Then gradually increasethe values depending, restarting from the previous calculation with the smallervalue. To choose the progressive values of LAMBDA look at the convergence of the eigenvalues.
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